† Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, D-14195 Berlin, Germany ‡ Max Born Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Max Born Strasse 2A, D-12489 ...

3). Unlike the Larmor frequency, this magnitude is independent of the magnetic field and the value can be compared across instruments. 6,7,8 Figure 5 provides an example of a proton (1 H) NMR spectrum ...

Hydrogen bonds are challenging to quantify by X-ray crystallography and cryo-EM due to difficulty of visualizing hydrogen atom locations but can be probed with site specificity by NMR spectroscopy in ...

Initially 10% of the gas feed will be replaced by hydrogen. If this goes well, the feed will be increased to 20%. This is the first time that such tests have been carried out on an industrial scale in ...

An elegant solution to determining the hydrogen content in oils has emerged in the form of nuclear magnetic resonance (NMR). Information on the relevant constituents of these oils, such as aromatics, ...

1 H NMR (42.5 MHz, neat) δ 3.45 (q, J = 7.1, 2 H, H-1), 1.36 (s, 3 H, H-2’), 0.60 (t, J = 7.1, 3 H, H-2). The number of proton environments in this compound are three and it can be observed from the ...

For 13 C NMR, the higher the concentration the better, since it is ~6000 times less sensitive than 1 H. For a satisfactory signal-to-noise ratio, ~3 mg per inequivalent carbon is needed on 500, 400 ...

This work is licensed under the Creative Commons Attribution International License (CC BY 4.0). It is experimentally well established that the phenolic systems such as phenol and diphenols undergo ...

Prior to experiments, these biomass materials were crushed, then particles in size of 0.10–0.20 mm was sieved and dried at 105°C for 24 h, stored in a desiccator for pretreatment and experiments ...